Tree-ring width of Quercus species from historical object sample 5660B/05A, N...
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Species: Quercus species; No of rings: 18; Age not determined; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
物种：栎属（Quercus）物种；生长轮数：18；年龄未测定；髓（pith）：不适用；心材（heartwood）：缺失；边材（sapwood）：缺失；边材生长轮数：0；树皮下的最后生长轮：缺失
